불꽃 반응 비교 실험

여러 금속을 테스트하여 불꽃 색 참조표 작성하기

Flame Tests Intermediate (High School) 45 분 ~$25.00

목표

6가지 서로 다른 금속 염에 대해 불꽃 반응을 수행하여 정성 분석용 특징적인 불꽃 색 참조표를 작성한다.

배경

This comprehensive flame test lab tests multiple metal salts side by side, building a reference chart that students can use for unknown identification. By comparing the flame colors of lithium, sodium, potassium, calcium, strontium, and copper directly, students develop the observational skills needed for qualitative chemical analysis.

안전 경고

  • Wear safety goggles at all times
  • Wear gloves when handling copper chloride
  • Handle HCl with care — avoid contact with skin
  • Keep hair tied back near open flames
  • Clean wire between each test to prevent cross-contamination

필수 개인 보호 장비

goggles gloves lab_coat

재료

  • Lithium chloride (LiCl) (0.5 g)
  • Sodium chloride (NaCl) (0.5 g)
  • Potassium chloride (KCl) (0.5 g)
  • Calcium chloride (CaCl₂) (0.5 g)
  • Strontium chloride (SrCl₂) (0.5 g)
  • Copper(II) chloride (CuCl₂) (0.5 g)
    Toxic
  • Hydrochloric acid (HCl) (50 mL)
    1M concentration
  • Cobalt blue glass (1 piece)
    For potassium identification

장비

Bunsen burner Nichrome wire loop 6 labeled watch glasses Forceps Lab notebook

실험 절차

1

Prepare six labeled watch glasses, each containing a small amount of one metal salt.

3 분 Wear gloves for copper chloride
2

Clean the nichrome wire thoroughly by repeatedly dipping in HCl and heating until the flame shows no color.

3 분
3

Test lithium chloride first. Dip wire in HCl, then into the salt, and hold in the flame. Record the crimson-red color.

3 분
4

Clean the wire thoroughly. Test sodium chloride and record the bright yellow flame.

3 분
5

Clean the wire. Test potassium chloride. Observe with naked eye, then through cobalt blue glass. Record the lilac/violet color.

4 분
6

Clean the wire. Test calcium chloride and record the orange-red flame.

3 분
7

Clean the wire. Test strontium chloride and record the scarlet-red flame.

3 분
8

Clean the wire. Test copper(II) chloride and record the blue-green flame.

3 분
9

Create a complete reference chart organizing the metals by flame color from red through yellow to green and violet.

5 분

예상 결과

A complete flame color reference chart: Li (crimson-red), Sr (scarlet-red), Ca (orange-red), Na (yellow), Ba (yellow-green if tested), Cu (blue-green), K (lilac/violet through cobalt glass). Each color should be distinguishable from the others.

정리

Clean the wire with HCl. Dispose of copper waste in the heavy metal waste container. Dispose of remaining salts per lab protocol. Clean and dry all watch glasses.

세부 정보

카테고리
Flame Tests
난이도
Intermediate (High School)
소요 시간
45 분
예상 비용
$25.00
단계
9
재료
8

더 많은 실험

스트론튬 불꽃 반응 15 min 나트륨 불꽃 반응 15 min 구리 불꽃 반응 15 min 리튬 불꽃 반응 15 min 바륨 불꽃 반응 20 min 칼륨 불꽃 반응 20 min 칼슘 불꽃 반응 15 min

Frequently Asked Questions

What is the objective of 불꽃 반응 비교 실험?
6가지 서로 다른 금속 염에 대해 불꽃 반응을 수행하여 정성 분석용 특징적인 불꽃 색 참조표를 작성한다.
How difficult is 불꽃 반응 비교 실험?
This experiment is rated as Intermediate (High School). It takes approximately 45 minutes to complete.
What safety precautions are needed for 불꽃 반응 비교 실험?
Key safety precautions include: Wear safety goggles at all times; Wear gloves when handling copper chloride; Handle HCl with care — avoid contact with skin.
What materials are needed for 불꽃 반응 비교 실험?
The main materials required are: Lithium chloride (LiCl), Sodium chloride (NaCl), Potassium chloride (KCl), Calcium chloride (CaCl₂), Strontium chloride (SrCl₂).
What results should I expect from 불꽃 반응 비교 실험?
A complete flame color reference chart: Li (crimson-red), Sr (scarlet-red), Ca (orange-red), Na (yellow), Ba (yellow-green if tested), Cu (blue-green), K (lilac/violet through cobalt glass). Each color should be distinguishable from the others.